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Thread: Heater problems on 97 Dodge 1500

  1. #1
    Join Date
    Jan 2009
    Posts
    2

    Default Heater problems on 97 Dodge 1500

    heater blows only cold air. Both heater hoses are hot. no dampness of carpet under core. new water pump installed six months or so ago. Engine temp is good. Runs around 180-190. Any thoughts on why no warm air from the heater?

  2. #2
    Join Date
    Jan 2007
    Posts
    4,832

    Default

    edr - There could be an air pocket in the heater core, heater core could be plugged or the blend door is not closing all the way in the A/C evaporator case. Thats about all tha could cause it.

  3. #3
    Join Date
    Jan 2009
    Posts
    2

    Default

    Thanks for the reply. Followed my manual (30041) and blowed water through one heater hose and made sure it was pouring out the other hose. Replaced the 180 thermostate with a 195. Getting air that is warmer than before but it is still well below what anyone would call luke warm. Do I have to replace the evapator case or can the blend door be repaired?

  4. #4
    Join Date
    Jan 2007
    Posts
    4,832

    Default

    ed - On the out side of the case there is either a cable or a vacuum or electric solenoid which attaches to the blend door. Look to see if it's connected to it. You can always try and disconnect the door actuator and move it by hand. If it won't close then there is something blocking the door from closing or the door itself is damaged, in which case you would have to remove the evaporator case.

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